Telewriter apparatus.



F. RITCHIE. TELEWRITBR APPARATUS.

APPLIOATION FILED 13110.10, 1910.

Patented J an. 5,1915.

2 SHEETS-SHEET 1.

mmwmy F. RITCHIE. TELEWRITER APPARATUS. APPLIGATION FILED DEO.10,1910. lbfififimo v Patented Jan.5,1915.

2 SEEETS-SHEET 2.

an sate trata rosrn'n RITCHIE, or ao'non, nNeLANn.

'rniznwnrrnn' errattarus.

meager.

Specification of Letters Patent.

Patented Jan... 5, with.

Appliction filed December 10, 1910. Serial No. 596,611.

trical engineer, have invented certain new and useful Improvements in Telewriter Ap paratus, of which the following is a specification.

This invention relates to telewriter or telautrgraph apparatus and in particular to the paper feeding devices of such apparatus.

The primary object of the present invention is to provide a more powerful and silent running paper-shifting apparatus than has-1 been possible hitherto with the usual single direct pull electromagnet type of apparatus, and with this object the paper-shifter is actuated by means of an electric motor which is connected with the paper gripping apparatus through a crank or equivalent gear, thereby obviating the necessity of providing any stop abutment for determining the feed of the paper the use of which gives rise to noise in working the apparatus, while at the same time insuring an absolutely definite stroke of the paper feeder.

The improved apparatus possesses the further advantages of being less sluggish in action than existing devices, the moving and magnetic parts of the motor having but little inertia as compared with the equivalent parts of a single direct pull magnet, so that the inoving parts of the motor at tain their normal speed substantially instantaineously. Moreover, the currents required for the working of the motor are much smaller and therefore more easily dealt with than in known apparatus in which the currents are so heavy that if, for example, the paper became deranged so as to arrest the movement .of the actuating magnet, there was a serious liability of the windings being burned up unless an automatic cu tout, for example an electric thermostatic cut-out, were provided. In the improved apparatus the motor is sufficiently powerful to tear the paper should the feedof the latter be improperly arrested.

According to the present invention there fore the paper is gripped and fed by a mechanism which is actuated by an electric motor. this motor being connected through suitable gear and a crank'pin and connecting rod or equivalent linkage with an arm on the shaft which carries the paper grippers. The motor which is fed from a suitable source of direct current, actuates not only the paper grippers but also, synchronously therewith, a switch which is associated with a relay operated by the writing currents. The connection between the gripping mechanism and the driving motor is suchthat at what may be regarded as the starting position the first movement of the gripping device due to the rotation of the crank causes the grippers to close on the paper and hold it fast against cooperating surfaces. The continued rotation of the crank shifts the gripping device and with it the paper at a speed which, at first slow, rapidly accelerates and again slows down. On the cessation of the momentary writing current the relay is denergized and its armature is retracted by its spring against the idle stop. The apparatus is so designed, however, that before this can occur the switch has been shifted so as to establish a circuit to the motor through the idle stop of the relay, and consequently the motor will continue to work, After half a turn of the crank actuating the gripper, the movementof the gripping device is reversed, the first part of the reverse movement causing the release of the paper and the remainder of the movement returning the device to such a position that the circuit to the motor is again established through the working stop of the relay when the latter is again energized by a'writing current.

The preferred construction of motor for looking at the underside. Fig. 2 is a front elevation, and Fig. 3 an end elevation of the improved apparatus, Figs. 4 and 5 bemg transverse sections showing the gripping device in two positions, one (Fig. A)

. pers and thereby to vary the range of move-- .and Fig. 7 is a diagram of the motor connections.

The gripping device is carried by apair of arms a extending upwardly from the rockshaft Z) upon which is mounted switch arm 0. in the ends of the arms a is a shaft d upon which are fixed the grippers d. These grippers cooperate with eccentric pinse adjustably secured in the endsof the arms a in proximity to the grippers d. By rotation of these eccentric pins it may be arranged to vary the lost motion of the gripmentof each .feeding stroke of the paper shifter. Asecond rod 7' extending between the arms a serves as a stay for the arms a and also as a stop for the grippers d. At an intermediate point of the shaft, (Z is fixed a crank d which is coupled by-connecting rod '9 with a crank pin it on a gear disk h which is suitably journaled in afixed part of the apparatus with its axis parallel with the rods d, The teeth of the disk It mesh with a pinion 2" which, for the purpose of silent working, is preferably ofcompressed fiber or the like, on the armature spindle i of a motor having six coils j which are coupled in pairs and connected with the bars of a lQ-section stationary commutator is in the manner shown in Fig. 7. The armature consists of two crossb'ars of soft iron Z, and mounted on the armature spindle is a brush on rubbing on the commutator bars and connected through a spring contact m' with one terminal of the supply.

The other terminal from the supply is connected with each of-the pairs of poles j, 9', 7' j 7' 31' and through them with the corresponding sets of commutator. bars is, 2 10 as shown in Fig. 7. As, however, the particular construction of motor forms no part of the present invention and is not essential thereto, it is to be understood that any suitable motor maybe employed The switch arm 0 cooperates with springcontacts at, n which are connected respectively with the front stop 0 and back stop 0 of the writing current relay armature p, and are slotted longitudinally to enable the overlap of'the switch arm a onthe contacts at, n to be adjusted. As shown diagrammaticallyin Fig. 6 the motor circuit 9 is normally broken at the relay but is completed as soon as the relay is actuated by a line current. The motor consequently .rotates-and through the crank it and arms a oscillatesthe'rock shaft 12 thereby shifting Extending between and journaled' the brush a from contact n to contact a. The motor circuit is thus broken until on the cessation of the line current the armature p isbrought into contact with the back stop 0. This reestablishes the motor circuit and the motor resumes rotation, moving the brush 0 back to the position shown in F 6, thereby again breaking the motor circuit until current is again received from the line.

Having thus described the nature of the said invention and the best means I know of carrying the same into practical c'fliect,

I claim 1. In an apparatus of the class described, the combination of paper shifting means embodying arms, a rotatable electric motor, and a connection between the said arms and the motor for actuating theformer, said connection embodying crank mechanism.

'2. Inan apparatus of the class described, the combination of paper shifting means embodying arms, an electric motor, av crank operatively connected with the papershifting means for operating the arms, and gear connection between the motor and the crank for operating the latter.

3. In an apparatus of the class described, the combination of a bodily oscillating pa.- per shifter, a rotatable electric motor, and means connecting the motor with the said paper shifter for oscillating the latter.

4. In an apparatus of the class described, the combination of a paper shifter embodying a bodily oscillating support and paper gripping means mounted thereon for movement therewith and independently with respect thereto, a motor, and means connecting the motor with the support and the said gripping means for operating them.

5. In an apparatus of the class described,

the combination of a paper shifter embodying a bodily oscillating support and paper gripping means supported thereby for movement therewith and independently with respect thereto, a rotatable motor,,and

means connecting the motor with the sup port and the said gripping means for simultaneously operating them.

6. Inan apparatus of the class described,

- the combination of a paper shifter embody 7., In an apparatus of the class described, the combinationv of a paper'shifter embodying a shiftable support, a gripper member carried bv-the support and movable with respect thereto, an adjustable stop with which the gripper cooperates for gripping the paper, a motor, and means embodying crank mechanism connected with the gripper member and the support, and also with the motor for operating the supportand I gripper.

8. In an apparatus of the class described, the combination of a paper shifter embody ing a shiftablesupport, a gripper member carried by the support and movable with respect'thercto, an eccentrically and adjust ably mounted stop with which the gripper cooperates for gripping the paper, a motor",

and means embodying crank mechanism connected with the gripper member and the support,and also with the motor for operatmotor, means embodying crank mechanism' connected with the gripper member and the support, and also with the motor for operating the support and gripper.

Ski-In an apparatus of the class described,

the combination of a paper shifter embodying a shiftable support, a gripper member carried by the support and movable with respect thereto, a stop with which the gripper cooperates for gripping the paper, a

ing the support and gripper, and an addi tional stop for limiting the movement of the gripper member in the opposite direction.

101; In an apparatus of the class described,

the combination of a. paper shifter embodys ing a'support mounted for oscillating move-- merit, a gripper member carried by the support for movement therewith and for movement independent with respect thereto, a stop with which the gripper member 'cooperates for gripping the paper, a motor, a

crank ctnnected with the motor, and a link connection between the crank and gripper member whereb the operation of the motor will oscillate the said support and operate the gripper member.

11. In an apparatus of the class described, the combination of a paper shifter oscillatable'to andfro, a motor, means connecting the motor and paper shifter, a motor circuit including separate conductors, a relay having an armature in the circuit adapted'to be connected to one-end of either conlatter to and fro, a motor circuit, a relay in the circuit, and a switch connected with and operable by the movement of the paper shifter for controlling the motor circuit through the relay. 13. In anapparatus of the class described,

the combination of an oscillating support, a

paper gripper carried thereby for movement therewith and for independent movement with respect thereto, a'motor, an operative connection between the motor and the sup port and paper gripper whereby both will be operated bv the motor, a circuit for the motor, and a switch connected with and 'movable with the support for controlling the niotor circuit.

14. In an apparatus of the class described, the combination of a paper shifter movable in opposite directions, a motor operatively connected therewith for operating the former, a motor circuit, a relay included in the motor circuit, said relay being also included in the line circuit, and a switch connected to vand operated synchronously with the paper shifter for controlling the motor circuit. i

15. In an apparatus of the class described, the combination of an oscillatable paper shifter movable in opposite directions, a motor operatively connected therewith for operating the former, amotor circuit, a relay included in-the motor circuit, said relay be ing also included in the line circuit, and a switch connected to and'operated synchronously with the paper shifter, said switch operating to establish a circuit for the motor prior to the deinergization of the relay on the cessation of the line .current.

-16. In an apparatus ,of the class described, the combination of a pivotally mounted paper shifter movable in opposite directions, a motor connected therewith for operating the shifter, a circuit for the motor, a relay-included in said circuit, said relay including spaced stops and an' armature movable therebetw'een, said relay being also inc uded in a line circuit, and a switch-connected to and operated synchronously with the paper shifter for controlling the motor circuit. said switch operating to be positioned to establish the motor circuit through one ofthe relay stops, when the relay is deenergized b the cessation of the line current, and prior to such deenergization.

1'7. In an apparatus of the class described,

the combinat'ionpf a non-rotatable paper shifter movable in opposite directions, a motor connected therewith for operating the shifter, a circuit for the motor, a relay included in said circuit, said relay includ ng spaced stops and an armature movable therebe'tween. said relav being also included in a line. circu1t,- and a switch operated synchronously with the paper shifter for controlling the motor circuit, said switch o erating to be positioned to establish the motor circuit through the backstop of the relay when the relay is deenergized by the cessation of the line current, and prior to such de'e'nergization.

18. In an apparatus of the class described, the combination of an oscillatable paper shifter.movable in opposite directions, -a motor with which the. shifter is connected v for. operation thereby, a circuit for the molttl tor, a. relay included in a line circuit emname to this specification in the presence of bodying spaced stops relatively adjustable two subscribing Witnesses. to vary the soaee therebetween, and a switch FOSTER RITCHIE [L' 8.1 svnchronously operated with the paper 5 shifter and cooperating With the said stops VVitn'esses:

for' controlling the motor circuit. JOSEPH MILLARD, In testimony whereof I have signed my N. J. SKERTEN. 

